CONSOLIDATED STATEMENTS OF CASH FLOWS NON-CASH SUPPLEMENTAL DATA (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
CONSOLIDATED STATEMENTS OF CASH FLOWS NON-CASH SUPPLEMENTAL DATA
Capital leases for the acquisition of promotional vehicles	$ 2.6	$ 1.5	$ 2.8
Accounts payable for treasury stock purchases		9.4
Accounts payable for equipment purchases	$ 0.1	$ 0.4	$ 0.1